And john walker



z (No Mod-e1.) 2 sheets-sheet -1'.

J. RICHARDS 8v J. WALKER.

MACHINE IOR DRIVING MANDRPLS, KEYS,-&0.

` Patented Apr. Z3, 1889.

M ffm/L I N. PETERS. Ph' linnn-naher, Walhngtun, DA C.

2 sheets-sheet 2, l J. RICHARDS R J. WALKRR. A- l f MACHINE FORDRIVINGMANDRELS, KEYS, 6m.

- No.. l l PatentedRpr. 23, 1889.

l. Bv( IIII\ ii l .A fl 1' WITNEEEEE- A V1m/ENT13m5- UNITED STATESPATENT OFFICE.

JOHN RICHARDS, OF SAN FRANCISCO, CALIFORNIA, AND -JOHN VALKER,

OF CLEVELAND, OHIO.

MACHINE FOR DRIVING MANDRELS, KEYS, 80.0.

SPECIFICATION forming part of iLetters Patent No. 401,968, dated April23, 1889. Application filed June 19, 1888. Serial Ilm-277,571. (Nomodel.)

To all whom it may concern:

Be it knownthat we, JOHN RICHARDS, of

San Francisco, in the county of San Francisco and State of California,and JOHN WALKER, of Cleveland, in the county of Cuyahoga and State ofOhio, have invented certain Improvementsin a Machine for DrivingMandrels, Keys, dac., of which the following is a specilication.

This invention relates to certain improvementsin a machine wherebymandrels, keys,

l and a variety of other similar devices may be driven or forced throughthe hubs of wheels and pulleys, and in fact through any piece ofmachinery in the manipulation of which such devices are employed, by asuccession of rapid blows delivered on the upper end of the mandrel orkey.

The said invention consists in a ram adapted to have a short rapidvertical reciprocating movement through the medium of a rotativeeccentric connected thereto, the said ram having a head which is feddown independently of the reciprocating movement of the ram properthroughthe 'medium of a screw which connects it to the said ram and isturned by means of a hand-wheel. The ram mechanism is placed directlyover an anvil-block which is supported by the bed-plate of the machineand on which Vthe pulley or wheel to be operated upon is laid.

In the further description of the said invention which follows referenceis made to the accompanying drawings, forming a part hereof, and inwhich- Figure I is a `part-ly4 sectional front eleva tion of theimproved machine, and Fig. II an end view of the same. Fig. III is asectional view of a part of the machine, and Fig. IV an exterior View ofanotherportion 'of the same.

Similar letters of reference indigate similar parts in all the views.

In the said drawings, A is the bed-plate of the machine, onwhichiserected andsecnred the anvil-block B.

C C are columns extending from the bedplate A to the girder D, securedin place by means of the bolts a.

E is the ram, consisting of a hollow cylinder adapted to have a verticalreciprocating driven.

movement within a sleeve, F, formed as a part of the said girder. Theinner diameter of the sleeve Fis considerably greater than the outerdiameter of the ram E, and from the interior face oi' the sleeve areprojected the bearings b, which guide the said ram in its reciprocatingmotion.

On the upper end of theram is fastened by means of bolts c a hollow cap,d, through the openingl e of which extends in a horizontal direction thedriving-shaft G. This shaft is supported in bearings f in the sides ofthe sleeve F, and the portion within the cap d is turned slightlysmaller than the remaining portion and eccentric with it. A box, H, intwo parts, serves to communicate motion from the eccentric to the raminthe operation of the machine. The eccentric is denoted in the drawingsby g.

The driving-shaft is provided with a tight and a loose pulley, L and M,and also with a balance or fly wheel to cause a regular movement of themachine. The top of the sleeve is removable to give access to theeccentric and its box.

I is a threaded bar screwed into a nut, h, held securely in the lowerend of the ram, and the lower end of this bar constitutes the ramheadwhich strikes the mandrel or key to be The threaded bar I is turned tolower the ram-head by means of a hand-wheel, J. A pin, 7c, in the bar Iserves to limit the motion ot' the same in a downward direction by stIbiking an offset, m, in the ram.

In Fig. I a gear-wheel with a turning-mandrel in its hub is shown asresting on the anvil-block. In order to suitmandrels of different sizes,we provide each machine with a set ofreducers, all of which have theirlower end of the same diameter as the hole in the anvil-block. One ofthese reducers is shown in Fig'. IV.

Supposing a wheel or pulley provided with a mandrel to be seated on theanvil-block, as shown in Fig. I, and the machine to be in motion, thedriving operation consists simply in feeding down the rain-head towardthe mandrel as the same recedes under the rapid strokes to which it issubjected by means of the handwheel.

IOO

IVe claim as our inventionl. In a machine for driving mandrels, dsc., areciprocating ram having a head which is rigidly connected thereto bymeans of a threaded bar, and a hand-wheel to turn thc said bar,substantially as and forthe purpose specified.

2. In amachine for driving mandrels, Lize., a reciprocating,` ram havinga head rigidly connected thereto by means of a threaded bar, and meanswhereby the said bar may be turned to feed down the said headindependently of the reciprocating motion of the said ram, substantiallyas and for thepurpose specified.

In a machine for driving mandrels, &c the combination of a sleeve, a ramconfined within the said sleeve and adapted to have a recilln'ocating,`motion therein, a driving-shaft extending through the said sleeve, whichis provided with bearings to support the said shaft, an eccentric formedin the said shaft, and means, substantially as described, to connect theeccentric with the ram, a ram-head united with the ram by means of ascrew carrying a hand-wheel, and an anVil-blocksituated under the saidram-head, substantially as and for the purpose specified.

4. In a machine'for drivingl mandrels, &c., the combination of a framecarrying a sleeve with laterally-placed bearings, a ram adapted to slidein the said sleeve, a ram-head connected to the ram by means of athreaded bar having means whereby it may be turned in the said ram, adriving-shaft supported in the said lateral bearings on the sleeveextending through the sleeve and provided with an cccentric, a.laterally-sliding box to communicate motion from the eccentric to theram, and means to effect the revolution of the said driving-shaft,substantially as and for the' JOHN RICHARDS. JOHN NVALKICR.

XVitnesses to the signature of John Richards:

E. II. THoMAs, M. C. HAMLIN. Vitnesscs to the signature of John lValkcr:

ALEXANDER S. TAYLOR, WM. G. TAYLOR.

